{"id":128711,"date":"2024-10-26T16:11:18","date_gmt":"2024-10-26T08:11:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/128711\/"},"modified":"2024-10-26T16:11:19","modified_gmt":"2024-10-26T08:11:19","slug":"redis%e5%af%a6%e7%8f%be%e5%8f%af%e4%bc%b8%e7%b8%ae%e7%9a%84%e9%9b%86%e5%90%88%e5%a4%a7%e5%b0%8f%ef%bc%88redis-%e8%a8%ad%e7%bd%ae%e9%9b%86%e5%90%88%e5%a4%a7%e5%b0%8f%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/128711\/","title":{"rendered":"Redis\u5be6\u73fe\u53ef\u4f38\u7e2e\u7684\u96c6\u5408\u5927\u5c0f\uff08redis \u8a2d\u7f6e\u96c6\u5408\u5927\u5c0f\uff09"},"content":{"rendered":"

Redis\u5be6\u73fe\u53ef\u4f38\u7e2e\u7684\u96c6\u5408\u5927\u5c0f\uff08redis \u8a2d\u7f6e\u96c6\u5408\u5927\u5c0f\uff09<\/h1>\n

\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cRedis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u7d50\u69cb\u5b58\u5132\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\uff0c\u5305\u62ec\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u5be6\u6642\u6578\u64da\u8655\u7406\u3002Redis\u7684\u96c6\u5408\uff08Set\uff09\u662f\u4e00\u7a2e\u7121\u5e8f\u4e14\u4e0d\u91cd\u8907\u7684\u6578\u64da\u7d50\u69cb\uff0c\u9069\u5408\u7528\u65bc\u9700\u8981\u5feb\u901f\u67e5\u627e\u548c\u53bb\u91cd\u7684\u5834\u666f\u3002\u7136\u800c\uff0c\u96a8\u8457\u61c9\u7528\u9700\u6c42\u7684\u589e\u9577\uff0c\u5982\u4f55\u6709\u6548\u5730\u7ba1\u7406\u548c\u8a2d\u7f6e\u96c6\u5408\u7684\u5927\u5c0f\u6210\u70ba\u4e86\u4e00\u500b\u91cd\u8981\u7684\u8ab2\u984c\u3002<\/p>\n

Redis\u96c6\u5408\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

Redis\u96c6\u5408\u662f\u4e00\u7a2e\u53ef\u4ee5\u5b58\u5132\u591a\u500b\u552f\u4e00\u5143\u7d20\u7684\u6578\u64da\u7d50\u69cb\u3002\u8207\u5176\u4ed6\u6578\u64da\u7d50\u69cb\u76f8\u6bd4\uff0c\u96c6\u5408\u7684\u67e5\u627e\u3001\u6dfb\u52a0\u548c\u522a\u9664\u64cd\u4f5c\u90fd\u5177\u6709O(1)\u7684\u6642\u9593\u8907\u96dc\u5ea6\u3002\u9019\u4f7f\u5f97Redis\u96c6\u5408\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u8868\u73fe\u51fa\u8272\u3002<\/p>\n

\u8a2d\u7f6e\u96c6\u5408\u5927\u5c0f\u7684\u9700\u6c42<\/h2>\n

\u5728\u67d0\u4e9b\u61c9\u7528\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u9650\u5236\u96c6\u5408\u7684\u5927\u5c0f\uff0c\u4ee5\u9632\u6b62\u5167\u5b58\u7684\u904e\u5ea6\u4f7f\u7528\u6216\u6578\u64da\u7684\u7121\u5e8f\u589e\u9577\u3002\u9019\u5728\u8655\u7406\u7528\u6236\u6703\u8a71\u3001\u7de9\u5b58\u6578\u64da\u6216\u5176\u4ed6\u9700\u8981\u63a7\u5236\u6578\u64da\u91cf\u7684\u5834\u666f\u4e2d\u5c24\u70ba\u91cd\u8981\u3002<\/p>\n

\u5be6\u73fe\u53ef\u4f38\u7e2e\u7684\u96c6\u5408\u5927\u5c0f<\/h2>\n

\u8981\u5be6\u73fe\u53ef\u4f38\u7e2e\u7684\u96c6\u5408\u5927\u5c0f\uff0c\u53ef\u4ee5\u63a1\u7528\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\uff1a<\/p>\n

1. \u4f7f\u7528Lua\u8173\u672c<\/h3>\n

Redis\u652f\u6301Lua\u8173\u672c\uff0c\u53ef\u4ee5\u5728\u670d\u52d9\u5668\u7aef\u57f7\u884c\u591a\u500b\u547d\u4ee4\u3002\u9019\u6a23\u53ef\u4ee5\u5728\u6dfb\u52a0\u65b0\u5143\u7d20\u4e4b\u524d\u6aa2\u67e5\u96c6\u5408\u7684\u5927\u5c0f\uff0c\u5f9e\u800c\u63a7\u5236\u96c6\u5408\u7684\u6700\u5927\u5bb9\u91cf\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8bLua\u8173\u672c\uff1a<\/p>\n

\nlocal max_size = tonumber(ARGV[1])\nlocal key = KEYS[1]\n\nif redis.call('SCARD', key) >= max_size then\n    redis.call('SPOP', key)\nend\n\nreturn redis.call('SADD', key, ARGV[2])\n<\/code><\/pre>\n
\u5728\u9019\u500b\u8173\u672c\u4e2d\uff0c\u9996\u5148\u6aa2\u67e5\u96c6\u5408\u7684\u5927\u5c0f\uff0c\u5982\u679c\u9054\u5230\u6700\u5927\u9650\u5236\uff0c\u5247\u522a\u9664\u4e00\u500b\u96a8\u6a5f\u5143\u7d20\uff0c\u7136\u5f8c\u518d\u6dfb\u52a0\u65b0\u5143\u7d20\u3002<\/p>\n
2. \u4f7f\u7528\u904e\u671f\u6642\u9593<\/h3>\n
\u53e6\u4e00\u7a2e\u65b9\u6cd5\u662f\u5229\u7528Redis\u7684\u904e\u671f\u6642\u9593\u529f\u80fd\u3002\u53ef\u4ee5\u70ba\u96c6\u5408\u4e2d\u7684\u5143\u7d20\u8a2d\u7f6e\u904e\u671f\u6642\u9593\uff0c\u9019\u6a23\u53ef\u4ee5\u81ea\u52d5\u6e05\u7406\u904e\u671f\u7684\u6578\u64da\uff0c\u5f9e\u800c\u63a7\u5236\u96c6\u5408\u7684\u5927\u5c0f\u3002\u9019\u5728\u8655\u7406\u81e8\u6642\u6578\u64da\u6642\u7279\u5225\u6709\u6548\u3002<\/p>\n
\nSADD myset \"element1\"\nEXPIRE myset 3600  -- \u8a2d\u7f6e\u904e\u671f\u6642\u9593\u70ba1\u5c0f\u6642\n<\/code><\/pre>\n
3. \u5b9a\u671f\u6e05\u7406<\/h3>\n
\u9664\u4e86\u4e0a\u8ff0\u65b9\u6cd5\uff0c\u9084\u53ef\u4ee5\u5b9a\u671f\u904b\u884c\u6e05\u7406\u4efb\u52d9\uff0c\u6aa2\u67e5\u96c6\u5408\u7684\u5927\u5c0f\u4e26\u522a\u9664\u591a\u9918\u7684\u5143\u7d20\u3002\u9019\u53ef\u4ee5\u901a\u904e\u5b9a\u6642\u4efb\u52d9\u6216\u4f7f\u7528Redis\u7684\u9375\u904e\u671f\u529f\u80fd\u4f86\u5be6\u73fe\u3002<\/p>\n
\u6027\u80fd\u8003\u91cf<\/h2>\n
\u5728\u8a2d\u7f6e\u96c6\u5408\u5927\u5c0f\u6642\uff0c\u6027\u80fd\u662f\u4e00\u500b\u91cd\u8981\u7684\u8003\u91cf\u56e0\u7d20\u3002\u4f7f\u7528Lua\u8173\u672c\u96d6\u7136\u53ef\u4ee5\u5728\u670d\u52d9\u5668\u7aef\u57f7\u884c\u591a\u500b\u64cd\u4f5c\uff0c\u4f46\u904e\u65bc\u983b\u7e41\u7684\u64cd\u4f5c\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\u3002\u56e0\u6b64\uff0c\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
Redis\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u5be6\u73fe\u53ef\u4f38\u7e2e\u7684\u96c6\u5408\u5927\u5c0f\uff0c\u7121\u8ad6\u662f\u901a\u904eLua\u8173\u672c\u3001\u904e\u671f\u6642\u9593\u9084\u662f\u5b9a\u671f\u6e05\u7406\uff0c\u90fd\u80fd\u6709\u6548\u5730\u7ba1\u7406\u96c6\u5408\u7684\u5927\u5c0f\u3002\u6839\u64da\u5177\u9ad4\u7684\u61c9\u7528\u5834\u666f\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63d0\u9ad8\u7cfb\u7d71\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u7ba1\u7406\u60a8\u7684\u6578\u64da\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u4f86\u904b\u884cRedis\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22\u5982\u4f55\u5728Redis\u4e2d\u8a2d\u7f6e\u53ef\u4f38\u7e2e\u7684\u96c6\u5408\u5927\u5c0f\uff0c\u512a\u5316\u6027\u80fd\u4e26\u6709\u6548\u7ba1\u7406\u6578\u64da\u5b58\u5132\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-128711","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128711","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=128711"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128711\/revisions"}],"predecessor-version":[{"id":128712,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128711\/revisions\/128712"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=128711"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=128711"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=128711"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}